Burner injection pipe

Abstract

A combustor injection pipe comprises a center injection pipe, an outer ring injection pipe and an end cover plate, the outer ring injection pipe comprises an outer injection pipe and an inner injection pipe, the center injection pipe and the outer injection pipe are integrally formed, a center cylindrical part and an outer cylindrical part are intersected and communicated, and the center cylindrical part, the outer cylindrical part and the communication position form a cover plate cavity. The end cover plate is embedded into the cover plate cavity, the side opening center air inlet hole and the center cylindrical part form a center air inlet hole, and the side opening outer air inlet hole and the outer cylindrical part form an air inlet hole; the inner compression pipe part is opposite to the outer nozzle mounting hole and fixed to the end cover plate, the outer cylindrical part and the inner injection pipe form an annular air cavity, and the air outlet end of the inner diffuser pipe is opposite to the outer compression throat. Fuel gas enters the inner injection pipe, air is introduced to be mixed and pressurized, then air sprayed out of the outer injection pipe and air and fuel gas mixed gas are mixed and compressed through the compression throat to enter the outer diffusion pipe, sufficient mixing is achieved, air is sufficient, combustion is sufficient, and the energy efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a stove burner, in particular to an ejector pipe of the burner. Background Art

[0002] The current existing technology, Chinese patent 200810183692.2, is a set of dual-purpose gas burners. Two sets of burner sets are used. The central set is a high- and low-pressure dual-flow oxygen-supplied gas burner. The nozzle is connected to the first-level ejector tube and installed in the wind chamber. The other end of the wind chamber is connected to the second-level ejector tube and the combustion head. When the gas enters the first-level ejector tube from the nozzle, the air is sucked in by the bell mouth of the ejector tube for ejection and diffusion. The air blown in by the fan enters the wind chamber and continues to be ejected and diffused to the second-level ejector tube. After the secondary diffusion of the double airflow, the gas enters the combustion head and sprays out the fire cover for high-power fierce fire combustion. The outer circle group is a natural oxygen-supplied ejector gas burner. The nozzle is connected to the ejector tube and installed on the combustion head. When the gas enters the ejector tube from the nozzle, the air is sucked in by the bell mouth of the ejector tube for diffusion and mixing, and then enters the combustion head to spray out the fire hole for slow fire combustion. There are problems: a fan is required, and the first-level ejector tube only serves to introduce gas.

[0003] Chinese Patent 201810421056.2, a gas nozzle and burner for reducing noise, the burner is composed of the venturi tube and the gas nozzle, the gas nozzle is used to spray gas toward the venturi tube and simultaneously introduce air. The venturi tube has opposite first and second ends of the venturi tube, the first end of the venturi tube is provided with a contraction, the contraction has an air inlet for introducing air, the contraction is provided with a guide ring for diverting to reduce aerodynamic noise, the guide ring is connected to the contraction and positioned inside the contraction, the guide ring has an outer surface facing the contraction and an inner surface away from the contraction, a first introduction channel is formed between the outer surface of the guide ring and the contraction, and a second introduction channel is formed on one side of the inner surface of the guide ring. The problem is that air and gas enter together and then mix, and there is a hidden danger of insufficient air. Utility Model Content

[0004] The utility model aims to provide a burner ejector tube, which has the characteristics of sufficient air, uniform mixing of air and fuel gas and complete combustion.

[0005] The utility model is implemented as follows: a burner ejector tube, which is special in that it includes a central ejector tube, an outer ring ejector tube and an end cover plate.

[0006] The central ejector tube includes a central cylindrical portion, a central compression tube portion, a central compression throat, and a central diffuser tube.

[0007] The outer ring ejector tube includes an outer ejector tube and an inner ejector tube, the outer ejector tube includes an outer cylindrical portion, an outer compression tube portion, an outer compression throat and an outer pressure expansion tube; the inner ejector tube includes an inner compression tube portion, an inner compression throat and an inner pressure expansion tube; an air ejection hole is provided on the circumferential wall upper plate of the opening end of the inner compression tube portion;

[0008] The end cover plate is provided with a side opening central air inlet hole, a central nozzle mounting hole, a central air inlet hole, an outer air inlet hole, an outer nozzle mounting hole and a side opening outer air inlet hole from left to right in sequence;

[0009] The central ejector tube and the outer ejector tube are integrally formed, and the central cylindrical portion and the outer cylindrical portion intersect and are connected, the central cylindrical portion, the outer cylindrical portion and the connecting portion constitute a cover plate cavity, the end cover plate is embedded in the cover plate cavity, the side opening central air inlet hole and the central cylindrical portion constitute a central air inlet hole, and the side opening outer air inlet hole and the outer cylindrical portion constitute an air inlet hole; the inner compression tube portion is opposite to the outer nozzle mounting hole and is fixed to the end cover plate, the outer cylindrical portion and the inner ejector tube constitute an annular air cavity, and the outlet end of the inner diffuser tube is opposite to the outer compression throat.

[0010] The burner ejector tube is special in that the central air inlet hole, the central nozzle mounting hole, the outer air inlet hole and the outer nozzle mounting hole are on the same horizontal line.

[0011] The burner ejector tube is special in that it also includes an intermediate connecting plate, on which connecting holes are arranged, and the intermediate connecting plate is connected to the central diffuser tube and the outer diffuser tube.

[0012] The burner ejector tube is special in that: the end of the central diffuser tube is provided with a central flange and a central air outlet interface, and the end of the outer diffuser tube is provided with an outer flange and an outer air outlet interface;

[0013] The center flange and the outer flange are connected by a longitudinal plate.

[0014] The utility model discloses a burner ejector pipe, wherein the fuel gas enters an inner ejector pipe and is introduced into air for mixing and pressurizing, and then the annular air flow ejected from the outer ejector pipe is mixed with the air and fuel gas mixture of the inner ejector pipe and compressed through an outer compression throat to enter an outer diffuser pipe, thereby achieving full mixing, sufficient air, full combustion, and improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model.

[0016] Figure 2 yes Figure 1 A-A view of.

[0017] Figure 3 It is a stereogram of the utility model.

[0018] Figure 4 It is one of the three-dimensional exploded views of the utility model.

[0019] Figure 5 This is the second three-dimensional exploded view of the present utility model. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1 As shown, a burner ejector tube comprises a central ejector tube 5, an outer ring ejector tube 1 and an end cover plate 4.

[0023] The central ejector tube 5 includes a central cylindrical portion 51, a central compression tube portion 52, a central compression throat 53, and a central diffuser tube 54.

[0024] The outer ring ejector tube 1 includes an outer ejector tube 2 and an inner ejector tube 3.

[0025] The external ejector tube 2 includes an external cylindrical portion 21, an external compression tube portion 22, an external compression throat 23 and an external pressure-expanding tube 24. The volume of the external compression tube portion 22 gradually decreases from the air inlet end to the air outlet end, playing a compression role; the external pressure-expanding tube is in the shape of a truncated cone, with the top round end connected to the external compression throat 23 and the bottom round end as the air outlet end. During the flow process, the pressure is gradually released;

[0026] The inner ejector tube 3 comprises an inner compression tube portion 31, an inner compression throat 32 and an inner expansion tube 33; an air ejector hole 311 is provided on the circumferential wall upper plate of the opening end of the inner compression tube portion 31;

[0027] The end cover plate 4 is provided with a side opening central air inlet hole, a central nozzle mounting hole 551, a central air inlet hole 552, an outer air inlet hole 42, an outer nozzle mounting hole 41 and a side opening outer air inlet hole from left to right;

[0028] The central ejector tube 5 and the outer ejector tube 2 are integrally formed and the central cylindrical portion 51 and the outer cylindrical portion 21 intersect and are connected; the central cylindrical portion 51, the outer cylindrical portion 21 and the connecting portion constitute a cover plate cavity; the end cover plate 4 is engaged with the cover plate cavity; the side opening central air inlet hole and the central cylindrical portion 51 constitute a central air inlet hole 552; the side opening outer air inlet hole and the outer cylindrical portion 21 constitute an air inlet hole 42; the inner compression tube portion 31 is opposite to the outer nozzle mounting hole 41 and is fixed to the end cover plate 4; the outer cylindrical portion 21 and the inner ejector tube 3 constitute an annular air cavity; the outlet end of the inner diffuser tube 33 is opposite to the outer compression throat 23.

[0029] The outer ring ejector tube 1 adopts such a structure that the gas-air mixture ejected from the inner ejector tube and the air ejected from the annular air cavity cooperate with each other, enter the external pressure throat 23 for pressurization and mixing, and then enter the external expansion tube; through experimental tests, the ejector tube of this burner is installed on the corresponding combustion system, which can greatly improve the working conditions of the combustion system (increased heat load, improved thermal efficiency, and reduced smoke under the same conditions). The test results show that the use of this burner ejector tube on the same burner can withstand a liquefied gas flow nozzle diameter of about 1.10mm and a natural gas nozzle diameter of about 1.90mm; the maximum value commonly used in the market is about 1.04mm, and the natural gas is about 1.60mm. The outer ring ejector tube adopts such a structure to meet the requirements of high power.

[0030] The central air inlet hole 552, the central nozzle mounting hole 551, the outer air inlet hole 42 and the outer nozzle mounting hole 41 are on a horizontal line; Figure 3 As shown, the central air inlet hole 552, the central nozzle mounting hole 551, the outer air inlet hole 42 and the outer nozzle mounting hole 41 are on the Y-axis.

[0031] As a further improvement of the utility model, it also includes an intermediate connecting plate 6 , on which a connecting hole 61 is provided, and the intermediate connecting plate 6 is connected to the central diffuser pipe 54 and the outer diffuser pipe 24 .

[0032] As a further improvement of the present invention: the end of the central pressure diffuser 54 is provided with a central flange 541 and a central gas outlet interface 542, and the end of the outer pressure diffuser 24 is provided with an outer flange 241 and an outer gas outlet interface 242;

[0033] The center flange 541 and the outer flange 241 are connected by a longitudinal plate 7 .

[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A burner ejector tube, characterized in that: It includes a central ejector tube, an outer ring ejector tube and an end cover plate. The central ejector tube includes a central cylindrical portion, a central compression tube portion, a central compression throat, and a central diffuser tube. The outer ring ejector tube includes an outer ejector tube and an inner ejector tube, the outer ejector tube includes an outer cylindrical portion, an outer compression tube portion, an outer compression throat and an outer pressure expansion tube; the inner ejector tube includes an inner compression tube portion, an inner compression throat and an inner pressure expansion tube; an air ejection hole is provided on the circumferential wall upper plate of the opening end of the inner compression tube portion; The end cover plate is provided with a side opening central air inlet hole, a central nozzle mounting hole, a central air inlet hole, an outer air inlet hole, an outer nozzle mounting hole and a side opening outer air inlet hole from left to right in sequence; The central ejector tube and the outer ejector tube are integrally formed, and the central cylindrical portion and the outer cylindrical portion intersect and are connected, the central cylindrical portion, the outer cylindrical portion and the connecting portion constitute a cover plate cavity, the end cover plate is embedded in the cover plate cavity, the side opening central air inlet hole and the central cylindrical portion constitute a central air inlet hole, and the side opening outer air inlet hole and the outer cylindrical portion constitute an air inlet hole; the inner compression tube portion is opposite to the outer nozzle mounting hole and is fixed to the end cover plate, the outer cylindrical portion and the inner ejector tube constitute an annular air cavity, and the outlet end of the inner diffuser tube is opposite to the outer compression throat.

2. A burner ejector tube according to claim 1, characterized in that: The central air inlet hole, the central nozzle mounting hole, the outer air inlet hole and the outer nozzle mounting hole are on a horizontal line.

3. The burner ejector tube according to claim 1, characterized in that: It also includes an intermediate connecting plate, which is provided with connecting holes and is connected to the central diffuser pipe and the outer diffuser pipe.

4. A burner ejector tube according to claim 1, characterized in that: The end of the central pressure diffuser is provided with a central flange and a central air outlet interface, and the end of the outer pressure diffuser is provided with an outer flange and an outer air outlet interface; The center flange and the outer flange are connected by a longitudinal plate.

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